Two of the countrys most well-known national parks both start with the same high-value Scrabble letter, Y. That means they sometimes get confused, so were here to sort things out, and even do a little comparing between the two of them. Although both parks were established in the late 1800s and have vast square footage filled with incredible natural beauty and wildlife, some key differences appeal to different groups of people. If youre a photographer, for instance, youll feel more of a pull towards Yosemite, where Ansel Adams created so many of his epic images (and where you can visit the Ansel Adams Gallery). In contrast, if you are a scientist, you may be more drawn to Yellowstonebecause of the interesting science behind the geothermal wonders. Whichever park you visit (and our best recommendation is to visit both, multiple times), youll find the awe of nature, which makes your time there unforgettable, and youll be figuring out when you can make the next journey out there.